Improved safe-lock



PATENT OFFICE.

JOHN FARREL, OF NEW YORK, N. Y.

IMPROVED SAFE-LOCK.

Specification forming part of Letters Patent No. 48,919, dated July 25,1865.

To all whom it may concern:

Y- Be it known that I, JOHN FARREL, of the city, county, and State ofNew York, have invented anew and useful Improvement in Locks forSafe,Vault, and other Doors; and I do hereby declare that the followingis a full, clear, and exact description thereof, reference being had tothe accompanying drawings, making part of this specification, in which-Figure l is an elevation of the inner face of a` safe-door with my saidinvention applied; Fig. 2, a horizontal section taken in the plane ofthe line A a of Fig. l; and Fig. 3, a vertical section taken in theplane of the line B b,Fig. l.

The same letters indicate like parts in all the gures.

To get access to the inside of safes, vaults,

Ste., burglars have frequently resorted to the expedient ot` introducinggunpowder through some aperture, and by the explosion thereof, or byother violent means, to break the connections by which the lock issecured to the door, thereby liberating the bolt by which the door islocked.

The object of myinvention is to prevent any such expedient fromunlocking the bolt or bolts which secure the door; and to this end mysaid inventionconsists in combining the bolt or bolts which fasten thedoor with the bolt of the lock by an intermediate mechanism, which, solong as the lock is in place, will admit of the lockbolt locking andunlocking` the bolt or bolts which secure the door, and which willpermit the lock-bolt to be separated or detached from it withoutunlocking the bolt or bolts which secure the door when by Violent meansthe lock is detached from the door or its means of security areotherwise destroyed.

In the accompanying drawings, a represents the door of a safe, and b btwo parallel bolts, fitted to slide in holes formed for that purpose intwo bars, c e, secured to the inside face of the door. These two boltsare firmly connected by a plate, d, against the inner face of the door,and formed with mortises adapted to slide on guidepinsee,projeetin gfrom the door, and on the spindle f of the knob g, by which the bolts bb are thrown. On theinner end of the spindle f there is a circular disk,h, with an elongated hole to receive a wrist-pin, t', that projects fromthe plate d, which connects the two bolts b b, so that by turning theknobg the bolts can be thrown in or out for ordinary use when notlocked. A radial slot, j, is formed in the disk h of sufficient size .toreceive one end of an auxiliary bolt, k, which is connected with andslides on the plate d, that connects the two bolts b l), and thisauxiliary bolt lc is provided with a spring-tumbler, l, pivoted to theplate d, to hold it (the bolt 7c) when thrown into the slot of the disk/L of the knob.

A lock, m, of any suitable construction, is secured to the inner face ofthe door, and to the outer end of the bolt n of this lock is attached aplate, o, which extends over the auxiliary bolt k, and which is bestmade of a corresponding shape; or, it' desired, this plate o may beaprolongation of the lock-bolt. A pin, p, projects from the face of thisplate o and extends into a inortise, q, in the auxiliary bolt k. Theupper edge of the plate o is formed with a notch to receive the tumblerl when it is depressed to lock the auxiliary bolt lc, which takes placewhen the lockbolt is thrown out and the auxiliary bolt k has locked thebolts b b. One side ot this notch is inclined to lift the tumbler tounlock the auxiliary bolt by the lirst part of the unlocking motion ofthe lock-bolt, so that it can be drawn out to liberate the disk h by thelatter part of theunlock ing motion of the lock-bolt. Thelength of themortise q in the auxiliary bolt k is sufficient to allow the pin p oftheplate o to movein it the required distance to lit't the tumbler Zbefore4 the auxiliary'bolt is moved.

From the foregoing it will be seen that after the bolts b b have beenthrown to bolt the door the radial slotj of the disk h is then in lineto receive the auxiliary bolt lo, by which it is locked, and which isforced into this slot by the lock-bolt. As the only connection betweenthe lock and the auxiliary bolt is by the pinp on the plate 0 of thelock-bolt working in the mortise of the auxiliary bolt, by theapplication of any violent force to the lock it will reA sult that thetwo will separate, leaving the bolts of the door locked by the auxiliarybolt.

If desired, a casing can be placed over the tumbler ot'- tbe auxiliarybolt to prevent its being` reached by any instrument which might beinserted through any aperture in the door opened bythe means employed toremove the lock.

Having described and represented the mode of construction by which Ihave successfully reduced my said invention to practice, I Wish it to bedistinctly understood that I do not limit my claim of invention to suchmode of ap"- plication, as the same mode of operation may be applied byother and equivalent means.

What I claim as my invention, and desire to secure by Letters Patent,is-

JOHN FARREL.

Witnesses WM. H. BISHOP, ANDREW DE LACY.

